It is announced at the beginning of the film that the year is 1945, and there is a prominent banner for Hartley High School's Homecoming. A young man entering the Marines says he's going to be stationed in Germany, which is important because he has to "Stop the Nazis." Homecoming dances at USA high schools are in October or November, which means the dialogue takes place in October or November of 1945. Hitler committed suicide in April of 1945, and the Nazi party quickly dissolved. World War II was over by the time this conversation took place.